查看文章

This paper reports on the annual net ecosystem exchanges of methane (CH₄), carbon dioxide (CO₂), sensible heat (H) and latent heat (LE) fluxes between tropical lowland rice and atmosphere as well as quantification of annual net ecosystem carbon (C) balance. This study included both wet and dry rice seasons and fallow periods as well. Cumulative annual net ecosystem CO₂ exchange (NEE) was −7.47 Mg C ha⁻¹ and net ecosystem CH₄ exchange (NEME) was +419.68 kg CH₄ ha⁻¹, respectively, which were higher than the reported values in the same ecology. The range of NEE was much wider in dry season compared to wet season. However, NEME did not vary considerably between the seasons. As a whole, integrated NEE was 52% higher in dry season, whereas, integrated NEME was 24% higher in wet season. In lowland rice ecology LE outweighed H. The NEME showed positive correlation with H …